A legal proceeding, commonly known as "deportation," that is conducted before a special immigration judge to decide whether or not an immigrant will be allowed to enter or remain in the country. While, generally speaking, a person who is already in the U.S. cannot be expelled without first going through a removal hearing, someone arriving at the border or a port of entry can be forced to leave without a hearing or ever seeing a judge. Those who are deported are barred from returning to the United States for at least five years unless the Immigration and Naturalization Service (INS) grants a special waiver.